I notice that the list of past tasks my systems have done is getting quite long. it goes all the way back to August 13. Originally, they disappeared a few hours after being validated. I had asked about that (it must have been on the old DNA@Home forum before CSG came along - I can't find that post here) and you increased the time to live for completed tasks but I didn't think you increased them that much.
I realize you've been very busy getting the crunching going and we appreciate all your efforts. This is something you can add to the list of small, minor, cleanup tasks. I'd place getting the stats our to the various stats sites should come ahead of this.